WYFF News 4 Investigates found there are dozens of sex offenders in the Upstate who are unaccounted for.

Sex offenders are required to register their address with the local sheriff's office every six months, but not everyone does that. WYFF News 4 Investigates learned that Spartanburg County deputies are looking for 18 sex offenders, Anderson County deputies are looking for 11 and Greenville County deputies say they are looking for 33 sex offenders. Deputies hope these people will turn themselves in.

By law in South Carolina, there is a mandatory curfew for sex offenders on Halloween between 5:30 p.m. and 9 p.m. It only applies to sex offenders who are currently on probation, parole and other forms of community supervision under the jurisdiction of South Carolina Department of Probation, Parole and Pardon Services. They must stay in their homes and keep the front lights turned off, and they cannot give out candy.

There is no mandatory curfew in North Carolina.

Deputies will be doing random home checks to make sure sex offenders are home.

Some Upstate agencies are taking it one step further. Anderson, Spartanburg and Cherokee counties are requiring sex offenders on probation or parole to meet at a central location during the curfew hours.

Since the curfew does not apply to all sex offenders, deputies say you should check the Sex Offender Registry website before letting your kids go trick-or-treating.